Table 2.

Asthma outcomes by gestational age group at ages 7 and 11

Wheezing in the last 12 months	Gestational age groups
	<32 weeks; very preterm	32–33 weeks; moderate preterm	34–36 weeks; late preterm	37–38 weeks; early term	39–41 weeks; full term
At 7 years	n=103	n=110	n=629	n=2417	n=8939
n (%)	25 (22.2)	23 (20.6)	79 (13.7)	304 (12.3)	1033 (11.4)
OR unadjusted (95% CI)	2.22 (1.26 to 3.90)	2.01 (1.18 to 3.41)	1.23 (0.90 to 1.67)	1.09 (0.94 to 1.26)	1
Fully adjusted OR (95% CI)*	2.04 (1.12 to 3.72)	1.85 (1.11 to 3.10)	1.19 (0.86 to 1.64)	1.06 (0.92 to 1.23)	1
At 11 years	n=106	n=106	n=618	n=2327	n=8533
n (%)	22 (17.1)	21 (20.5)	78 (12.5)	283 (11.5)	976 (11.1)
OR unadjusted (95% CI)	1.65 (0.96 to 2.82)	2.06 (1.13 to 3.76)	1.14 (0.82 to 1.58)	1.04 (0.87 to 1.23)	1
Fully adjusted OR (95% CI)*	1.64 (0.93 to 2.91)	1.84 (1.04 to 3.25)	1.12 (0.81 to 1.54)	1.03 (0.87 to 1.22)	1
Currently on asthma medication
At 7 years	n=103	n=110	n=629	n=2417	n=8939
n (%)	10 (12.8)	8 (7.8)	40 (5.8)	127 (5.4)	389 (4.3)
OR unadjusted (95% CI)	3.29 (1.45 to 7.44)	1.90 (0.88 to 4.16)	1.38 (0.95 to 2.00)	1.27 (1.02 to 1.58)	1
Fully adjusted OR (95% CI)*	3.01 (1.25 to 7.28)	1.71 (0.82 to 3.55)	1.35 (0.92 to 1.97)	1.24 (0.99 to 1.56)	1
At 11 years	n=106	n=106	n=618	n=2327	n=8533
n (%)	11 (12.4)	13 (14.5)	39 (5.0)	134 (5.5)	425 (4.9)
OR unadjusted (95% CI)	2.75 (1.28 to 5.91)	3.29 (1.60 to 6.80)	1.03 (0.71 to 1.50)	1.13 (0.90 to 1.41)	1
Fully adjusted OR (95% CI)*	2.73 (1.24 to 6.02)	2.96 (1.48 to 5.91)	1.00 (0.69 to 1.47)	1.12 (0.89 to 1.41)	1

Unweighted counts and survey-weighted proportions reported.

*Adjusted for child’s sex, ethnicity and age at interview; household’s national statistics socioeconomic classification, maternal age at delivery, lone parent family and alcohol use during pregnancy.